[thincom2000]

Um... although the text may APPEAR to be deleted, it should still be there when you edit the post... Also if you don't close the tag, I'm pretty sure vBulletin just doesn't parse it. That has been my experience, anyway.

When you said "dangerous," I thought for a moment you had somehow installed my [anything] tag which isn't included with this hack, and a spammer having permissions to use it messed up your entire board.

The purpose of [preview] is just to override the AdminCP setting with a new value, and was not meant to be used as BB-code (it just makes use of the BB-code parser because then I don't have to write code myself to parse it out). I, for one, abhor typing in a "short article" for a preview, and then typing a different article for the actual article. So that's why it just shows the first numeric_value words of the article.